ITEM NAME:4.2Dc Bluetooth Mp3 Decoder Board Decoding Mp3 Player Audio Module Support B7S4 4.2Dc Bluetooth Mp3 Decoder Board Decoding Mp3 Player Audio Module Support B7S4 Panel function button schematic:1. LCD display: It can display the title of Chinese and English songs, copy the songs and corresponding lyrics files into the U disk at the same time, and display the lyrics of the played songs synchronously.2. In USB/s ds mode: Short press for playback pause key/Fm radio mode: Short press for automatic search station. 3. BT/USB/s ds mode: Short press is the last song, long press is the volume reduction. / Fm radio mode: Short press is the last one, long press is the volume reduction. / AUX mode: Long press is the volume reduction.4. USB/s ds mode: Short click is optional for muffler or 10 + function. (Software should set two functions before
